Bloomfield lbvi kenyon



(No Model.)

B. L. KENYON.

MEOHANIGAL TELEPHONE.

Patented Aug. 31,1886. qx. 1 9 2:

' INVENTOR:

BY Um/WW WITNESSES ATTORNEYS.

UNITED STATES PATENT OFFICE.

BLOOMFIELD LEVI KENYON, OF LEE CENTRE, NEXV YORK.

MECHANICAL TELEPHONE.

SPECIFICATION forming part of Letters Patent No.348,328, dated August 31, 1886.

Application filed December 21, 1885.

To all whom it may concern.-

Be it known that I, BLOOMFIELD LnvI KENYON, of Lee Centre, in the county of Oneida and State of New York, have invented a new and Improved Mechanical Telephone, of which the following is a full, clear, and exact description.

The object of my invention is to provide a new and improved transmitter and receiver for mechanical telephones, which instrument transmits all sounds distinctly and sharply, is simple in construction, and is not apt to get out of order.

The invention consists in the combination, with a box, of rods held in thesanie, bars secured to the rods, and adiaphragm held by the said bars. A wire is passed through an aperture in the diaphragm, and through a loop formed on the end of the wire a piece of wood is passed, which is held against the front of the diaphragm.

Reference is to be had to the accompanying drawings, forming a part of this specification, in which similar letters of reference indicate corresponding parts in all the figures.

Figure 1 is a front view of my improved telephone. Fig. 2 is a longitudinal sectional elevation of the same on the line 00 m, Fig. 1. Fig. 3 is a sectional plan view of the same 011 the line 9 g Fig. 1.

On the inner surface of the back, A, of a box, B, a transverse strip, 0, is secured,which is provided with an aperture, D, extending from the front of the strip to the back of the box. From the top and bottom of the strip 0 rods E project upward and downward, and the ends of each pair are united by wooden bars F adjacent to the ends of the box. The said bars F have grooves H in their inner surfaces at the front edges, and in the said grooves the ends of a wooden tympanum or diaphragm, G, are placed. The grooves are widened at their bottoms, and the ends of the diaphragm do not rest on the bottoms of the grooves, as shown.

The diaphragm G is provided with a central aperture, 3, through whichthe transmitting-wire Ii is passed, provided at its ends with a loop, L, through which a short wooden or metal cross-piece, M, is passed, which is Serial No. 186,416. (No model.)

pressed against the front of. the diaphragm. The cross-piece is preferably made of hickory or other hard or tenacious wood.

Oross-pieces N are secured on the front of the box at the top and bottom. As there is no metal, or only very little, in the instrument the ringing and sharp metallic sounds are avoided, and all sounds produced are sonorous, clear, and distinct.

The apparatus is notaffected by frost. It cannot corrode. Contraction and expansion of the transmitting-wire does not affect the instrument. The rods E form elastic supports for the bars holding the diaphragm, and the diaphragm is held free and clear from the case or box, which renders it very sensitive. The diaphragm has a Very large receiving and very little resisting surface.

Having thus fully described my invention, I claim as new and desire to secure by Letters Patent 1. In a mechanical telephone-instrument, the combination, with a box, of wooden rods secured on the same, wooden bars held by the rods, and a wooden diaphragm held by said bars, substantially as herein shown and de scribed.

2. In a mechanical telephone-instrument, the combination, with the box B, of the strip 0, having an aperture, the rods E on the strip, the bars F, secured to the rods E, and the diaphragm G, held in the bars F, substantially as herein shown and described.

3. In a mechanical telephone-instrument, the combination, with the box 13, of the strip 0, the rods E, the bars F, having grooves H, and the diaphragm G, having its ends passed into the said grooves, substantially as herein shown and described.

4. In a mechanical telephoneinstrument, the combination, with the box B, of the strip 0, the rods E, the bars F, the diaphragm G, having the aperture J, the wooden cross-piece M, and of the wire K, substantially as herein shown and described.

BLOOMFIELD LEVI KENYON.

\Vitncsses:

CHARLES E. STEDMAN, XVILLARI) DUNBAR. 

